Celestine

Celestine is formed by precipitation directly from seawater or even during the consolidation of seabed, where in the rock there are spherical clays of celtic, sometimes with a cavity and well-defined crystals inside. Celestine, strontium sulphate, is similar to a similar barite, but in nature it is slightly less widespread than barite. It can be colorless, white, pale blue, yellowish, rarely red or brown. They consist of earthy, hollow, stalked, column-to-fibrous aggregates, concretions, and collectors of well-known columnar and tabular well-defined crystals, transparent and translucent, perfectly and well cleavable in two directions, on crystal-like surfaces glossy to matte.